AS1346 DC-DC Series

ams AS1346 DC-DC series is suited for SSDs, mobile internet devices, laptops, and PDAs

Image of ams AS1346 DC-DC Seriesams AS1346 DC-DC series is a dual, step-down DC-DC high efficiency converter series in a compact 3 x 3 mm TDFN package for space-limited applications with low power. This series is targeted at portable devices such as laptops, PDAs, mobile internet devices, and solid state drives (SSDs).

The AS1346 DC-DC series has constant frequency, dual buck converters available with fixed-voltage versions in 100 mV increments from 1.2 V to 3.6 V. They provide two independent DC-DC regulators with output currents between 0.5 A and 1.2 A. The two channels operate 180° out-of-phase to reduce input voltage ripple and minimize input capacitor requirements. The devices operate over a broad input voltage range (2.7 V to 5.5 V) and feature an automatic power-save mode. In shutdown mode, supply current decreases to ≤1 μA. In addition, a highly efficient duty cycle provides low dropout operation, prolonging battery life in portable systems, while an internal synchronous switching scheme increases efficiency and eliminates the need for an external Schottky diode. The internally fixed switching frequency (2.0 MHz) allows the use of small surface mount inductors.

Features and Benefits
  • High efficiency: Up to 95%
  • Input voltage range: 2.7 V to 5.5 V
  • 12-pin TDFN 3 x 3 mm package
  • Constant frequency operation: 2.0 MHz
  • 180° out of phase operation
  • Low battery detection
  • Low dropout operation: 100% duty cycle
  • Shutdown mode supply current: ≤1 μA
  • No Schottky diode required
  • Output disconnect in shutdown
  • Non standard variants available within two weeks
  • Output voltage range: 1.2 V to 3.6 V (available in 100 mV steps)
  • SSD applications
  • Mobile communication devices
  • Laptops and PDAs
  • Ultra-low-power systems
  • Threshold detectors/discriminators
  • Telemetry and remote systems
  • Medical instruments


ImageManufacturer Part NumberDescriptionFunctionOutput ConfigurationAvailable Quantity
IC REG BUCK 1.8V/3.3V DL 12TDFNAS1346-BTDT3318IC REG BUCK 1.8V/3.3V DL 12TDFNStep-DownPositive0AS1346-BTDT3318 product page link
Published: 2013-07-02